Tool-setting gauge for lathes and the like



Maly 4 1926. 1,583,292 E. F. HEARD ET AL TOOL SETTING GAUGE FOR LATHES AND THE` LIKE Filed Nov. 11. 1924 Patented May 4,1926.

UNITED STATES PATNT OFFICE.

EDMUND P. HEARD, OP ELIZABETH CITY COUNTY, AND MAYO M. PITZITUGH, or NRW- PORT News, VIRGINIA, AssIeNORs To NEWPORT NEWS sI-IIPBUILDING & DRY DOCK COMPANY, or NEWPORT News, vIReINA, A rVIRGINIA CORPORATION.

TOOL-SETTING GAUGE FOR LATI-IES AND THE LIKE.

Application led November 11, 1924. Serial No. 749,183.

To all whom t may concern Be it known that we, EDMUND F. HEARD and MAYO M. FITZI-IUGH, citizens of the United States, residing, respectively, in the county of Elizabeth City, State of Virginia, and city of Newport News, County of yTarwick, State of Virginia, have invented cert-ain new. and useful Improvements in Tool- Setting Gauges for Lathes and the like, of which the following is a full, clear, and complete description. j

l Our invention relates'to tool setting gauges for lathes and the like, whereby the tools may be set to duplicate the work ina simple, reliable and eiiicient manner. In our cofV ending application, Serial No. 749,854 filed November 14, 1924, we have filed Vdouble' gang tool holders on a slidable carriage movn able at right angles to the lathe center, the carriage being provided lwith a stop adapted to strike adjustable screws positioned on opposite sides of said stop to a fixed elementof thel lathe, and the screws were adjusted to the proper position for duplicating the Work. IVhen the movement of the tool hold- 'ers is limit-ed in this manner, considerable diticulty is experienced in duplicating sizes of the work due to the inability of different operators to exert the sameeifort on the cross-feed screw which moves the carriage, or the same operator exerting the same efort at different times, resulting in more or less inaccurate work.

. vThe present invention has for its object the provision of means for positively determining when the desired denite relation of position has been duplicated, after having first been determined, between the work axis or a point on the work axis, and a cutting tool of an engine lathe, boring mill or other metal turning machine operating on the lathe principle. i

Our invention will be better understood from the following description taken in connection with' the accompanying drawings, and its scope will be pointed out in the appended claims.

In the drawings illustrating our invention:

Fig. 1 is a top plane view showing a part of a double tool lathe having our invention thereon,

Fig. 2 is a verticalr section taken on the line 2-2 of Fig. 1,

3 is an end view of Fig. 1 and Fig. 4 is a section takenl onjthe line 4 4 of Fig. 1. y

Referring to the drawings in which the numeral 1 indicates a lathe bed for a-carr1age`2, movable parallel to the lathe centers,

having a tool slide 3, movable at right "an-k gies to the travel of the carriage, that is,'

toward and from the lathe centers, 1n any suitable manner, such as by across-feed screw not shown in the drawings, which slide 3 carries tool holders or blocks 4, 5, positioned on opposite sides of the lathe centers. For a more detailed description of the lathe per se, reference may be had to our copending application referred to above, al-

'through the description set forth will suthce for our present invention.

The carriage 2 1s provided `with blocks or brackets 6, 7 for supporting a shaft 8 parallel with slide 3. One 'end of said shaft is journaled in a bearing 9 in block 6, and its opposite end is formed with a seat 10 adapted to receive a screw 11 having a conical point. By means of screw 11, shaft 8 may be adjusted until its shoulders 12 abut block 6, thereby eliminating longitudinal lost motion. Lost motion at right anglesto the axis of shaft8 at its end adjacent block 7 is eliminated by. the conical point of screw 11. IVhile shaft 8 may rotate about its axis, it may beaccurately adjusted to eliminate lost motion.

A base or plate 13 is suitably fixed to-the shaft 8 such as by screws 14. A lever 15`is pivoted on said plate 13 at 16, and is 'connected at one end by a link 17 to a bell crank 18 which is pivoted to the plate 13 at 19. The bell crank 18 carries a pointer 20, adapted to cooperate with a scale 21, on the plate 13, having its zeropoint as indicated.

VThe pointer 20 is normally urged against a stop 21 by a spring 22. A protective cover 23 for the mechanism described'may be secured to plate 13 by screws 24. In this case one of the screws 24 may serve as the stop 21. The lever 15iis provided with stops 25, 26 on opposite sides from its pivot 16 and equidistantly therefrom las shown. The tool slide 3 carries brackets 27, 28 having respectively screws 29, 30 parallel to itself. These screws Inay'be respectively provided with locking screws 31, 32. The block 6 caryposition for the stops 25, 26, of lever to be engaged respectively by screws 29 and 30 as tool slide 3 moves back and forth.

In view of the foregoing detailed description, the oper-ation of our invention will be readily understood Jfrom a brief description thereof. ifi-Then tool slide?) has been moved to the left as viewed in Fig. 1. until tool io-lder 5 with its cutting tools is in proper relationto the worir being turned, and which it is desired to duplicate, the screw 80, which no-w engages stop 25, is turned .until the pointer 2O rests on the zero point, after which the screw 30 is locked by screw 32, With respect to tool holder 4l, the same -procedure is followed byv turning screw 29, which engages stop 25, and locking same by screw 31. lf it is desired to advance the tool slide 3 beyond the limits allowed by said indicator gauge, the unit may be rotated about its anis 8 away from the tool slide 3, until 1t bears against a rest 34, on the carriage 2, provided for this purpose.

From a f consideration of the above description, taken in connection with the drawings, our invention will be apparent without further explanation, and the advantages set forth prior to the detailed description will be readily recognized. We do not wish to be understood as heilig limitedto the details of Aform or arrangement of parts that may be made by those skilled in the art without departing 'from the spirit and scope of our r invention.

ldhat we claim and desire to secure by United States Letters Patent is:

l. In a lathe having a carriage, a tool slide, a plurality ot cutting tools carried thereon, a device of the character described comprising an indicator associated therewith on said carriage for indicatingI the cutting positions of said tools, and means carried by said tool slide-comprising adjustable contacting members adapted to operate said indicator when said tools have attained the limits corresponding to their respective iinal cutting positions on the -worlr vbeing machine 2. In a lathe having a carriage and a tool slide, a device of the character described comprising an indicator on said carriage for indicating the position of a plurality of tools normally urged in one direction and adjustable means carried by said tool slide adapted to actuate said indicating means comprising stops contacting with elements joined to said indicator to show the positions oit the tools.

3. A lathe comprising a carriage, a toolslide thereon carrying a plurality of tool holders, a pointer on said carriage, stops on said` slide, an adjustable member on the carriage for contacting with a stop-for moving the pointer and a second adjustable member4 on the carriage tor contacting with another stop to move said pointer whereby the positions oil the tools may be determined.

t. ln a lathe having a carriage and a tool slide thereon, a device of the character dcscribed comprising a base, means rotatably supporting said base on said carriage, a pivoted element on said base, a pointer pivoted on said base connected with said element, resilient means urging said pointer in one direction, and adjustable stops' carried by said tool slide, adapted to engage Asaid element and thereby move said pointer in the opposite direction.

. 5. ln a lathe having a carriage and a tool Vslide thereon, a device of the character described comprising a base, means rotatably supporting said base on said carriage parallel with said tool slide, a pivoted element on said base, a pointer pivoted on said base connected with said element, ,resilientmeans urging said pointer in one direction, and adj ustable stops carried by said tool slide adapted to engage said element and thereby move said pointer in the opposite direction.

6. In a lathe havinga carriage and a tool slide thereon, a device of the character described comprising a base, means rotatably support-ing said base on said carriage, adjustable means for preventing lost 'motionH of said base on its supporting means, a pivoted element on said base, a pointer pivoted on said base connected with said element, resilient means urging said pointer in one direction, and adjustable stops carried by said tool slide adapted to engage said element and thereby move said pointer in the opposite direction. i f

7. In a lathe having a carriage and a tool slide thereon, a device of the character described compris-ing a base, means rotatably supporting said base on said carriage, a pivoted element on said base, a pointer pivoted on said base connected with said element, resilient means urging said pointer in one direction, and adjustable stops carried by said tool slide positioned on opposite sides of said element adapted to engage said element and thereby move said pointer in the opposite direction.

8. In a lathe having a carriage and a tool slide thereon, a device of the character described comprising a base plate, adjustable `means rotatably supporting said plate on said slide, an indicating scale on said plate, a pointer pivoted on said plate adapted to move over said scale, means normally urging said pointer in one direction, adjustable stops carried by said tool slide, an element pivoted on said plate positioned intermediate said stops and adapted to be engaged by said stops, and means connecting said element and said pointer whereby said pointer is moved over said scale when said element is engaged by either of said stops.

9. In a lathe having a carriage and a tool slide thereon, a device of the chafaetel described comprising a shaft, means rotatably supporting said shaft on Said carriage, ad jns'table means for preventing lost motion of said Shaft in its supporting means, a base plate xed on said shaft having an indioafcn ing scale thereon, a pointeil pivoted on said plate adapted to move over said scale, means normally niglngsa-id pointer 1n one 'direction, adgustable stops carried by said tool Slide, an elemenl'J pivoted on'sad plate positioned intermediate said stops and adapted to loe engaged by said Stops,-and means connecting seid element and said pointer whereby said pointer is moved over said scale when said element is engaged by either of said Stops. j

Signed this 6th day of November, 1924.

EDMUND F. HEARD.- MAYo M. FITZHUGH. 

